%0 Journal Article %A Ignatyev, Alexander O. %A Ignatyev, Oleksiy %T Quadratic forms as Lyapunov functions in the study of stability of solutions to difference equations %J Electronic Journal of Differential Equations %D 2011 %V 2011 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2011__2011__a86/ %G en %F EJDE_2011__2011__a86